I tried looking around but this humble soul doesn’t have much in the way of receiving donations. I suggest contacting him via https://github.com/Catfriend1 to ask for an alternative and if he gets back to you, share it here for other people who dislike paypal.

Fyi the syncthing-fork guy (catfriend1) who’s still updating has a donating button on F-droid via Liberapay. It’s up to you if your financial situation allows you to donate, but the more of us help the remaining developers for their time, in particular those of us that rely so much on their work, the better off we’ll be. Let’s give them a little motivation to keep working on this.

FYI2 syncthing-fork (as written and confirmed in this thread) has an import button for your folders from syncthing Android.

This app was incredibly important to me. I don’t really understand what the developer was saying about Google Play either. What does Google want from him?

I’ll be saving this post for all the suggestions in the comments. Hopefully, a viable alternative presents itself. I’ve been making a lot of tech illiterate friends reliant on this app, and they’re going to be asking me for an alternative.